Model Boat Mayhem
Technical, Techniques, Hints, and Tips => Wood Care: => Topic started by: Tom Eccles on January 04, 2008, 06:44:10 pm
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Right then gentlemen I need some advice.
I will be most grateful if anyone can let me know if there is a formula for shaping the deck supports to acheive the correct amount of camber.
The model is an A Class yacht (just in cse this has any bearing on the required amount of camber)
Many thanks
Clegg
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Just to make sure we are talking about the same thing, c is a straight line between points X and Z, called the cord, the curved line would be called arc length XZ.
Assuming you know c (BEAM) (not XZ) and m then the formula would be:
r = (m² + ¼c²)/2m
This gives you the radius of the curve / Camber
m is the height of the of the camber.
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Brilliant!!! :) :) :)
Many thanks Banjo.
Clegg
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Another question.
Is there a formula for height "M"?
For example something like .020 inches per inch of beam? or do I just make an arbitary assumption based on what looks right?
Sorry to be a pain but this is probably my last build and I want to leave my grandson something to be proud of.
Clegg
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There is a discussion here on deck camber on sailing ships:
http://cs.finescale.com/forums/839493/ShowPost.aspx
The suggestion of 1/4" for every foot of max beam is borne out in the plans for my 1/16 Brittany Trawler Marie Joseph which shows a camber of 0.2" for a beam of 9.8"
HTH
Doug
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If you are working from plans then take it from there. If you are scratch building then you decide how much camber looks good and the formula gives the radius. Its just maths not model making. ;D
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dougal99 & Banjo,
Terrific, thank you both for your responses.
Best Regards
Clegg